AOD troubles....

P

Pinball

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May 19, 2004

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Apr 22, 2005

#1

• Apr 22, 2005

• #1

I did a bit of searching but couldnt find any definate answers.... I got a 89 5.0 aod, the trans works great in every gear except fourth. As soon as it switches into fourth it just revs up. Could the 4th gear be shot?

 

jaymac

New Member

Feb 18, 2004

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Northern Mass

Apr 22, 2005

#2

• Apr 22, 2005

• #2

4th gear is overdrive, and it is a band, not clutches, and yes, it could def. be shot. Is the fluid brown (burnt or does it smell burnt?) How many miles? Any mods to the AOD?
Could be the OD servo gone bad.
Does the OD have a seperate pump? Someone else will have to chime in on that one. I'm no expert, but I recently had mine rebuilt and asked alot of questions and got alot of answers. Try to do a search on Overdrive or OD band....
Good Luck, and for the time being, just keep it in D and avoid the highways if you can

 

LX302

Stanger

Founding Member

Feb 29, 2000

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Bethlehem PA

Apr 22, 2005

#3

• Apr 22, 2005

• #3

Yes, jaymac is right, the Overdrive band is shot/burnt. Common problem with these trannys.
So save up for a rebuild or auto replacement, or maybe a 5spd conversion.

 

P

Pinball

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May 19, 2004

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Apr 22, 2005

#4

• Apr 22, 2005

• #4

LX302 said:

Yes, jaymac is right, the Overdrive band is shot/burnt. Common problem with these trannys.
So save up for a rebuild or auto replacement, or maybe a 5spd conversion.

Click to expand...

Know any good companies where i could order a rebuild kit? i should also just get some 4.10s while im at it.

 

jaymac

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Feb 18, 2004

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Apr 22, 2005

#5

• Apr 22, 2005

• #5

I got all my stuff through Andre @ www.edgeracingconverters.com
He has another company called Transmission parts plus on EBay and he will sell you the high performance rebuild kit, converter (if you want it), Superservo (if you want it). Basically, everything in my sig, he can get for you .
One stop shopping!
Oh yeah, you'll probably also need a new OD band. I don't know if he has those, but ask. You could upgrade to a 2" kevlar OD band, but it's alot of $$, and you shouldn't beat on your car in OD anyway!

 

shonoff

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Dec 16, 2004

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Ohio

Apr 22, 2005

#6

• Apr 22, 2005

• #6

Make sure your passing gear cable to the throttle body is attached.$1.00 plastic grommit broke on mine and the cable come off and mine wouldnt go into 4th.Its probably not what is wrong with yours but it only takes about 30 seconds to check.And yes get the 4.10s.Good luck

 

P

Pinball

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May 19, 2004

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Apr 22, 2005

#7

• Apr 22, 2005

• #7

shonoff said:

Make sure your passing gear cable to the throttle body is attached.$1.00 plastic grommit broke on mine and the cable come off and mine wouldnt go into 4th.Its probably not what is wrong with yours but it only takes about 30 seconds to check.And yes get the 4.10s.Good luck

Click to expand...

interesting, that may be the problem, the engine was just swapped before i bought it...... Got a website or instructions on what exactly i should look for? I just got off 12 hour duty and its dark so i dont really feel like going out there to try and find it.....

 

shonoff

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Dec 16, 2004

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Ohio

Apr 22, 2005

#8

• Apr 22, 2005

• #8

[/IMG] Its right under the air inlet hose.My finger is touching it.

 

SilverFoxbody

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Apr 7, 2005

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Apr 22, 2005

#9

• Apr 22, 2005

• #9

OD band is shot.....you have few options

If you plan on selling the car - and don't have a guilty mind you can elongate the OD servo pin to engage burnt band.

Otherwise you will need to replace the band and while you are at it put a GOOD od servo in so it won't happen again.

but if your TV pressure is not right, you will burn up the band prety quick....so check your TV adjustment first.

 

jaymac

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Feb 18, 2004

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Northern Mass

Apr 22, 2005

#10

• Apr 22, 2005

• #10

What IS the "correct" adjustment for the TV cable??
Just the way you like it to shift, or what?
Cuz I have 4.10's shift kit, and 2800 stall, so my shift points are altered anyway, so how do you know what the "right" adjustment is?

 

nosmatt

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Oct 13, 2000

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Bass Lake, Ca

Apr 22, 2005

#11

• Apr 22, 2005

• #11

use a guage to set the tv pressure. do a search.


tv is not why you have probs! if the tv pressure was off enough to destroy the trans, it would have happened. the direct clutch would be the one to go also, the clutches would burn up, and you would have no 3rd gear, or, it would weld together, and would be mechanically stuck in third.....and would kill the engine when you stop.

your od band is fried, in all likelyhood. could be a servo, could be a valve in the valve body.......but that just grasping at straws.


if you do rebuild it, youll need some special tools as well..... baby that sucker, and build a spare on the side if possible.

good luck

 

P

Pinball

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May 19, 2004

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Apr 22, 2005

#12

• Apr 22, 2005

• #12

thanks for the picture shonoff, i'll be sure to look for that when i get off duty today. Stuck here again for another 12 hours i really hope its this little thing and not the tranny itself.....

 

shonoff

Member

Dec 16, 2004

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Ohio

Apr 23, 2005

#13

• Apr 23, 2005

• #13

No problem on the picture thing.Like I said before its probably not what is wrong with yours,but I try to eliminate the simple things first.I read some of your previous posts and it sounds like the car was beat on by the previous owner,add that to the 130k miles on it and it doesnt look good.When I thought mine was shot,someone on here told me the Hughes Performance premium kits are the best to get.I cant remember what else he said my thread was lost in the crash.--Good luck to you.

 

P

Pinball

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May 19, 2004

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Apr 23, 2005

#14

• Apr 23, 2005

• #14

yea, i assume he beat on it too. I was talkin to my buddy who is into stangs and he said the traction lock is most likely bad too. He said the ones they put on them stock were crappy and usually didnt last long..... but im gonna wait untill i get the tranny fixed untill i test out the diff....